Integrated
Circuit
Systems, Inc.
ICS952621
General Description
ICS962621
is a programmable 48 pin clock chip following Intel CK409 Yellow Cover specification. This clock synthesizer provides a single
chip solution for next generation P4 Intel processors and Intel chipsets.
ICS962621
is driven with a 14.318MHz crystal. It generates CPU
outputs up to 200MHz. It also provides a tight ppm accuracy output for Serial ATA support.
Block Diagram
PLL2
Frequency
Dividers
48MHz, USB, DOT, VCH
X1
X2
XTAL
REF (1:0)
CPUCLKT (1:0)
CPUCLKC (1:0)
SRCCLKT0
SCLK
SDATA
VTTPWRGD#
PD#
FS_A
FS_B
MODE
Control
Logic
Programmable
Spread
PLL1
Programmable
Frequency
Dividers
STOP
Logic
SRCCLKC0
3V66(3:0)
PCICLK (5:0), PCICLK_F (2:0)
CPUCLKT_ITP
CPUCLKC_ITP
I REF
RESET#
Power Groups
Pin Number
VDD
3
27
10,16
34
48
24
--
40
GND
6
28
11,17
37
47
23
47
43
Description
Xtal, Ref
3V66 [0:3]
PCICLK outputs
SRCCLK outputs
Master clock, CPU Analog
48MHz, Fix Digital, Fix Analog
IREF
CPUCLK clocks
0756A—09/10/04
3
ICS [ INTEGRATED CIRCUIT SYSTEMS ]
